I was stationed in Alaska off and on for almost 20 years, and sometimes one can't even get to sleep because of the sunlight. In about April/May most families placed aluminum foil in many B/R windows and removed the foil in October. Problem solved for very little expense. AND - the foil can be easily removed daily if desired.
'16 JAYCO 154BH SLX, Baja Ed
'13 Silverado 1500LT, 4WD, Ext. Cab, 5.3 ltr.
"Fair Winds and Following Seas"